wont run on.On...will only run on prime

[dvx400rider04]

i rolled my quad and i fired it up and rode around and it wouldnt run on the on setting it would go but it cuts out everyoce in a while but on prime it runs fine and its been on that seting for almost a year of riding now its not urgent just wondering why weve cleaned carbs and stuff like that

[cataway]

you could have a hole in a hose ,you could have a hose off ,there could be a hole in the diaphragm.
my self ,i would say get a raptor petcock

[YOURADHERE]

Sounds like a vacuum line is disconnected.

[Limited Z_400]

I would say possibly your vacuum line may be blocked or plugged.If you vacuum line was off your low idle would be way off (too fast)because it would be too lean.If that is ok check out your fuel cock assy.good luck

[dvx400rider04]

k thanx ill check it out

[jonboy]

Check you gas cap vent as well. Check to see if all the boots are tight and not torn. Like catawy state get a Craptor 660 petcock.

[twincat800]

ive always just left mine on the primary posistion with my fcr39 carb and never have problems

[Limited Z_400]

Raptor fuel cock assy. will bolt up to the Z tank good to know.